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Method and apparatus for displaying one or more measurement values of arbitrary measurement variables on a screen
| Details |
Inventors: Herweg, Arnulf;
Assignee:
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
The invention offers the opportunity of reproducing measurement values of arbitrary measurement variables, in color as well, on a screen and of storing them as needed. According to the invention, a measurement voltage (Ux) corresponding to a measurement variable is supplied to an adding amplifier (12), which is simultaneously supplied with a voltage (Us) of sawtooth-like course, which is synchronized by the frame-frequency pulses or line-frequency pulses (fsynV or fsynH), as a result of which if a threshold value is exceeded, a signal (tx) which is time-proportional to the measurement voltage (Ux) is emitted for further processing to a video signal. The reproduction of the measurement value (or values) on the video display terminal can take place in the form of a horizontal or vertical bar, and threshold value markers, scaling lines, character symbols and so forth can be reproduced as well. |
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DETAILED DESCRIPTION I claim: 1.
A method for displaying one or more measurement values of arbitrary measurement variables on the screen of a video display terminal (VDT) operating by the line-scanning process, in particular a color VDT, in which line-frequency pulses and frame-frequency pulses are generated in a synchronizing pulse generator, the method comprising: generating a measurement voltage (Ux) corresponding to a measurement variable; standardizing said measurement voltage in a measurement voltage amplifier; simultaneously supplying said standardized measurement voltage and a sawtooth voltage to an adding amplifier; synchronizing the sawtooth voltage (Us) by the frame-frequency or line-frequency pulses; supplying the output voltage of the adding amplifier to a threshold switch; causing said switch to emit a time-proportional signal if the threshold value is exceeded by the summed voltage; sending the resulting signal proportional to the measurement voltage to a subsequent gate circuit synchronized with the line-frequency or frame-frequency pulses; and sending said proportional signal, after level adaptation and synchronizing pulse mixing, to the VDT as a video signal.
2.
A method as defined by claim 1, wherein the sawtooth voltage (Us) has an ascending edge, further comprising synchronizing said sawtooth voltage with the frame-frequency pulses or a frequency corresponding to the frame-frequency pulses, in such a manner that the reproduction of the measurement value on the screen of the VDT takes place increasingly from bottom to top.
3.
A method as defined by claim 1, wherein the sawtooth voltage (Us) has a descending edge, and further comprising synchronizing said sawtooth voltage with the frame-frequency pulses or a frequency corresponding to the frame-frequency pulses, in such a manner that the reproduction of the measurement voaue on the screen of the VDT takes place from top to bottom.
4.
A method as defined by claim 1, wherein the sawtooth voltage (Us) has an ascending edge, and further comprising synchronizing said sawtooth voltage with the line-frequency pulse or a frequency corresponding to the line-frequency pulses, in such a manner that the reproduction of the measurement value on the screen of the VDT takes place increasingly from right to left
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